![\"\"](\"http:\/\/caddyinfo.com\/wordpress\/wp-content\/uploads\/2010\/04\/2010-3.6L-V6-VVT-DI-LLT-CTS-LoR2.jpg\" "\\"2010")
<\/a>2010 GM 3.6L V-6 VVT DI (LLT) for Cadillac CTS<\/p><\/div>\n
What are the features one would need to fit these disparate platforms?\u00a0 For the Camaro, you might might focus on maximum torque, and maximum peak horsepower.\u00a0 For the Cadillac, you might focus on noise, vibration, and harshness while delivering maximum power in a fluid manner.\u00a0 The LLT V6 manages to fulfill both bills with aplomb.<\/p>\n
First, the LLT V6 is a 60 degree V-angle engine.\u00a0 The ideal V angle for balance alone for a 6 cylinder is 120 degrees, to time when opposing cylinders fire and offset the secondary moment.\u00a0 This is determined by dividing 720 degrees (2 revolutions for a 4-cycle engine) by the number of cylinders.\u00a0\u00a0 Due to packaging (width of the engine) and because it results in a very smooth running engine, 60 degrees is generally accepted as the optimal V-angle for a modern V6.<\/p>\n
Variable Valve Timing:<\/strong> The LLT uses variable valve timing to optimize its power range.\u00a0 Dual overhead cam (DOHC) engines such as the LLT have the advantage of different cams for the intake and exhaust.\u00a0 VVT engines have the further advantage of phasing the input and output camshafts to provide the optimum low rpm Torque and high RPM power.<\/p>\n Cam phasing also pays big dividends in reducing exhaust emissions. By closing the exhaust valves late at appropriate times, the cam phasers create an internal exhaust-gas recirculation system. The 3.6L V-6 VVT DI meets all emissions mandates without complex, weight-increasing emissions control systems such as EGR and air injection reaction (AIR).<\/p>\n Direct Injection <\/strong>is a relatively new technology that directly injects fuel into the combustion chamber at high pressure.\u00a0 This results in more complete and regulated combustion.\u00a0 Traditional fuel injection systems inject a fuel air mixture upstream of the intake valve.\u00a0 Further, the combination of DOHC, VVT, and DI work synergistically to deliver power, fuel economy, and low emissions.<\/p>\n What is next for the LLT V6?<\/strong> This engine family was originally designed to support displacements up to 4L, and to support Supercharging or Turbocharging.\u00a0\u00a0 We may see the 3L variant with a power adder instead of the 3.6L\u00a0 variant, but the 3.6L will always be close to my heart; I have been driving these 3.6L’s in the non-DI LY7 version for six years now and they are very reliable, flexible engines.\u00a0 With the addition of forced induction they will be even better.<\/p>\n","protected":false},"excerpt":{"rendered":" When can a single V6 engine work well in a Cadillac or a Camaro?\u00a0 When it is as good as the LLT V6. What are the features one would need to fit these disparate platforms?\u00a0 For the Camaro, you might … Continue reading